SU600582A1 - Device for representation of vectors on tv receiver screen - Google Patents

Description

one

The invention relates to computing and is used in television-type devices for graphically displaying information that comes from a digital computer in binary code.

A device for displaying graphic information on the screen of a standard television receiver is known, comprising a storage unit, a circulating buffer memory, symbol and simple graphic symbol generators, a parallel image code converter into a video signal, and sync pulse generators.

one.

The closest in technical essence to the invention is a device for displaying vectors on a television receiver screen, containing off-state registers connected to PI elements, a clock generator, a logic converter and an OR element connected to a television receiver connected to a synchronous generator, a main memory unit and a block of additional iam connected to the logic converter 2.

These devices have a low graphic resolution. Each code of 6 bits corresponds to the display of characters on a raster consisting of 5X7 to 6x9 dots, while

the same code corresponds to a graphic image, consisting only of 6 integrated points and occupying the same screen area. Ensuring greater resolution leads to rapid growth (2, where n is the number of raster points) of a persistent storage device (ROM) for all possible images on a raster. Although the size of all possible vectors grows much slower, the amount of ROM for all possible vectors displayed on an 8x8 raster grows to many tens of thousands of bits. In addition, additional difficulties arise in reconciling the address of the ROM with the form of representing vectors in a computer. All this significantly complicates the application of a device as a device for displaying vectors on a television device with the resolution of an alphanumeric video display.

The purpose of the invention is to simplify the device and improve its case.

This goal is achieved by the fact that the Device contains a block of elements P connected with blocks of main and additional memory, a spichrogenerator and elements I, connected to a synchronous generator, an adder connected to a block of additional memory, a logic transducer n block of eleiteites P, and the code comparison unit, connected to the additional memory block, to the Sihrogsprasor and to the block of elements I.

FIG. 1 is a block diagram of a worm for displaying images on a screen on a receiver screen; in fig. 2 - 5 vector on the screen.

The device for displaying all video sources on the TV screen contains the number 1 unit 1 main unit, unit 2 doiolpnguyu us, snp generator 3, TV-receiver 4, elements 5 and 6, register 7 and 8, the scheme OR 9, unit 10 comparison codes , adder And, logical transformer 12, block 13 elements I. The device operates as follows. The imaging unit on a certain strip of the screen from the block 2 of additional memory cyclically, on each line of the raster, are issued the codes of the image elements located on this strip. With the last line of the last band inserted, the synchro-generator 3 inputs the signal and the last line, and in block 2 of this, from the block 1 of the main memory, block 13 of the elements I is recorded in the next pixel of the elements of the next night.

The signals of the points on the screen are recorded in a parallel code, or in the shift register 7 (even cells), or in the shift register 8; (odd cells). If the signals are sent to the register 7, the transfer of the shift pulses is rectified, and the shift pulses are applied to the shift register 8. Tener pa television receiver 4 through the circuit And 9 signals are sent to the signal of points, which were recorded in register 8, when the contents of register 7 were read.

The signals for synchronization of recording in the registers 7 and 8, shift pulses, and also the receiver's snoop signals are generated by the clock generator 3.

The essence of the proposed solution is an eostation in the way of representing the code of the image elements in the additional memory block and in its subsequent conversion to signals written to registers 7 and 8.

In the block of additional information at the end of each wave, the codes are assigned the codes of the following quantities (see Fig. 2): the coordinates of the initial point of the vector Xi, in cells; the strings of the light of the segment Ah on each line; the initial line of the goo vector in the cells; of the coicky line r / 2 vectors in the cells.

In order to get the spirals of light points on the initial line of the vector, you must add x to the zation. the value of Ah, and then by the value of Xi and Xi + Dl: determine the points of the light of the right segment. At the same time, the backup Xi + + AH serves as the initial coordinate of the light of the segment along the next line. Therefore, it is necessary to register it in the block before executing us, to the place of the initial point of the Tener on the next line, Xi + + D and D are summed up, and the sum A + 2Д.х is recorded on the place Xi +, etc. This process should

continue until the current line is between the starting line i / i and of course the L-trokogo g / 2 image of the vector.

ii in the proposed arrangement, the ochocal hoii coordinates of the light segment is summed with the signal of 1 cm of the nomos of the honeymooner 11. The sum and the beginnings of the 01 coordinates of the coordinates of the primary generator 12 will be given. light points. The initial and coherent lines of the vector are compared by block 10 of the same w codes to the signal of the current line, supplied from the clock generator 3. If the current line is between these lines, a signal is generated that permits writing the sum of the sum to a block of additional type 2. I have received this signal opens the elements And 5 and b for passing gates of common impulses, which go out from the generator 3 to the ethn elements. The output signals of elements of Oh and b are used to enable the recording of signals in register 7 at a time of 8 shifts.

If more than one vector should be drawn in one cell, from block 2 of the last one, several words are given sequentially describing these vectors. At the time of the first and every new word, the signals of the luminous points 1 are transmitted to the shift register 7 (or register 8), where the image is superimposed on one another. This achieves the possibility of rimepi of the same arrangement for the simultaneous Fifth image of several vectors.

The technical and economic effect of using the device by comparison with known raster methods consists in the possibility of constructing more complex graphic images on the television reception screen, while maintaining the convenience of editing and image, as well as the possibility of labeling and dividing the image into graphic elements. . The proposed device has a cheap standard deviation of the system and provides for the acquisition of complex images by means of video signals of individual images (background, grids, etc.); does not contain nodes that would be subject to the requirements in comparison with nodes of ordinary alphanumeric video sources.

F o rm u l a i 3 o b e p e n u

A device for displaying vectors on a television receiver screen, containing shift registers connected to AND elements, a horizontal controller, a local converter and an OR element associated with a television receiver not connected to the satellite receiver, a main unit and an additional memory block TI associated with a 1 ces converter, characterized in that, since the device simplification